linux-kernel - Re: [PATCH v3 0/5] KVM: selftests: aarch64: Introduce pmu_event_filter

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Date: Fri, 26 Jan 2024 11:25:15 +0100
From: Eric Auger <eauger@...hat.com>
To: Shaoqin Huang <shahuang@...hat.com>, Oliver Upton
 <oliver.upton@...ux.dev>, Marc Zyngier <maz@...nel.org>,
 kvmarm@...ts.linux.dev
Cc: James Morse <james.morse@....com>, kvm@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
 Shuah Khan <shuah@...nel.org>, Suzuki K Poulose <suzuki.poulose@....com>,
 Zenghui Yu <yuzenghui@...wei.com>
Subject: Re: [PATCH v3 0/5] KVM: selftests: aarch64: Introduce
 pmu_event_filter_test

Hi Shaoqin,

On 1/16/24 07:01, Shaoqin Huang wrote:
> The test is inspired by the pmu_event_filter_test which implemented by x86. On
> the arm64 platform, there is the same ability to set the pmu_event_filter
> through the KVM_ARM_VCPU_PMU_V3_FILTER attribute. So add the test for arm64.
> 
> The series first move some pmu common code from vpmu_counter_access to
> lib/aarch64/vpmu.c and include/aarch64/vpmu.h, which can be used by
> pmu_event_filter_test. Then fix a bug related to the [enable|disable]_counter,
> and at last, implement the test itself.
which branch does it apply on? I fail to apply on top on main.

Or can you provide a branch?

Eric
> 
> Changelog:
> ----------
> v2->v3:
>   - Check the pmceid in guest code instead of pmu event count since different
>   hardware may have different event count result, check pmceid makes it stable
>   on different platform.                        [Eric]
>   - Some typo fixed and commit message improved.
> 
> v1->v2:
>   - Improve the commit message.                 [Eric]
>   - Fix the bug in [enable|disable]_counter.    [Raghavendra & Marc]
>   - Add the check if kvm has attr KVM_ARM_VCPU_PMU_V3_FILTER.
>   - Add if host pmu support the test event throught pmceid0.
>   - Split the test_invalid_filter() to another patch. [Eric]
> 
> v1: https://lore.kernel.org/all/20231123063750.2176250-1-shahuang@redhat.com/
> v2: https://lore.kernel.org/all/20231129072712.2667337-1-shahuang@redhat.com/
> 
> Shaoqin Huang (5):
>   KVM: selftests: aarch64: Make the [create|destroy]_vpmu_vm() public
>   KVM: selftests: aarch64: Move pmu helper functions into vpmu.h
>   KVM: selftests: aarch64: Fix the buggy [enable|disable]_counter
>   KVM: selftests: aarch64: Introduce pmu_event_filter_test
>   KVM: selftests: aarch64: Add invalid filter test in
>     pmu_event_filter_test
> 
>  tools/testing/selftests/kvm/Makefile          |   2 +
>  .../kvm/aarch64/pmu_event_filter_test.c       | 255 ++++++++++++++++++
>  .../kvm/aarch64/vpmu_counter_access.c         | 218 ++-------------
>  .../selftests/kvm/include/aarch64/vpmu.h      | 135 ++++++++++
>  .../testing/selftests/kvm/lib/aarch64/vpmu.c  |  74 +++++
>  5 files changed, 490 insertions(+), 194 deletions(-)
>  create mode 100644 tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
>  create mode 100644 tools/testing/selftests/kvm/include/aarch64/vpmu.h
>  create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vpmu.c
>